[PDF] Dell UltraSharp 24/27 - USB-C Hub Monitor - U2421HE/U2721DE

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Model: U2421HE/U2721DE

Regulatory model: U2421HEt/U2721DEt

Dell UltraSharp 24/27

USB-C Hub Monitor - U2421HE/U2721DE

User's Guide

NOTE: A NOTE indicates important information that helps you make better use of your computer. CAUTION: A CAUTION indicates potential damage to hardware or loss of data if instructions are not followed. WARNING: A WARNING indicates a potential for property damage, personal injury, or death.

Copyright © 2020 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks

are trademarks of Dell Inc. or its subsidiaries. Other trademarks may be trademarks of their respective

owners.

2020 - 11

Rev. A03

Contents

About Your Monitor .................................5 Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Product Features

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Identifying Parts and Controls

. . . . . . . . . . . . . . . . . . . . . . . . 7

Monitor Specifications

. . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Plug-and-Play

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

LCD Monitor Quality and Pixel Policy

. . . . . . . . . . . . . . . . . . . .24 Setting Up the Monitor .............................25 Attaching the Stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Using the Tilt, Swivel, and Vertical Extension

. . . . . . . . . . . . . . . .27 Adjusting the Rotation Display Settings of Your System . . . . . . . . . .28

Connecting Your Monitor

. . . . . . . . . . . . . . . . . . . . . . . . . . .29

Organizing Your Cables

. . . . . . . . . . . . . . . . . . . . . . . . . . .32

Removing the Monitor Stand

. . . . . . . . . . . . . . . . . . . . . . . .32

Wall Mounting (Optional)

. . . . . . . . . . . . . . . . . . . . . . . . . .33 Operating the Monitor ..............................34 Turning on the Monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Using the Front Panel Controls

. . . . . . . . . . . . . . . . . . . . . . .34

Using the OSD Lock function

. . . . . . . . . . . . . . . . . . . . . . . .36

Using the On-Screen Display (OSD) Menu

. . . . . . . . . . . . . . . . .39

Contents | 3

4 | Con tents

Troubleshooting ...................................56 Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

Built-in Diagnostics

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .57 Setting USB-C Prioritization when USB-C Charging is set to On

During Power Off

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Common Problems

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

Product Specific Problems

. . . . . . . . . . . . . . . . . . . . . . . . . .60 Safety Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63 FCC Notices (U.S. only) and Other Regulatory Information . . . . . . . .63

Contacting Dell

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63 EU product database for energy label and product information sheet . . .64

Setting Up Your Monitor

. . . . . . . . . . . . . . . . . . . . . . . . . . .64

Maintenance Guidelines

. . . . . . . . . . . . . . . . . . . . . . . . . . .66

About Your Monitor | 5

About Your Monitor

Package Contents

Your monitor ships with the components shown below. Make sure that you have received all the components and contact Dell if something is missing. NOTE: Some items may be optional and may not ship with your monitor. Some features may not be available in certain countries.

Display

Stand riser

Stand base

Power cable (varies by country)

USB Type-C cable (C to C)

6 | About Your Monitor

DP cable

U2421HE Color Calibrati

on

Factory Report

Every Dell U2421HE is shipped incorporating pre-tuned standard mode(sRGB) with average Delta-E 2. This helps prevent significant color inconsistency or inaccuracy when content is displayed onscreen. In addition, a tighter grey-scale tracking on each U2421HE helps enable ultra-smooth color gradation. The factory measurements from this very unit are shown here.

Be assured of Accurate, Precise and Consistent

Onscreen Color with every Dell

UltraSharp U2421HE.

Serial No.

Tester

Test

EquipmentCN00WG2J7444572B046L

2008
L0415 CA-

210/CA-310

CA- 2000
S

Chroma 2326/2235/2233

Standard mode (sRGB)Avg. Delta E 2

Gray-Scale Tracking

Gamma Note: Calibrations were done according to Dell approved test procedures using calibrated

equipment at the factory production line. This Report is provided only with and for this new Dell U2421HE

UltraSharp monitor. Results may vary with other test equipment, setups and test patterns. Please retain this Report

for your reference as Dell is unable to reproduce it or provide a duplicate.

ŲQuick Setup Guide

ŲSafety,Environmental,and

Regulatory Information

ŲFactory Calibration Report

Product Features

The Dell UltraSharp U2421HE/U2721DE monitor has an active matrix, thinfilm transistor (TFT), liquid crystal display (LCD), and LED backlight. The monitor features include:

ŲU2421HE: 60.47 cm (23.8 in.) active area display (Measured diagonally) 1920 x 1080 (16:9) resolution, plus full-screen support for lower resolutions.

ŲU2721DE: 68.47 cm (27 in.) active area display (Measured diagonally) 2560 x 1440 (16:9) resolution, plus full-screen support for lower resolutions.

ŲWide viewing angles with 99% sRGB color with an average Delta E<2. ŲTilt, swivel, pivot and vertical extension adjustment capabilities.

ŲRemovable pedestal and Video Electronics Standards Association (VESA™) 100 mm mounting holes for flexible mounting solutions.

ŲUltra-thin bezel minimizes the bezel gap in multi-monitor usage, enabling easier set up with an elegant viewing experience.

ŲExtensive digital connectivity with DP helps future-proof your monitor. ŲSingle USB Type-C to supply power to compatible notebook while receiving video signal. ŲUSB-C and RJ45 ports enable a single-cable, network-connected experience. ŲPlug and play capability if supported by your system. ŲOn-Screen Display (OSD) adjustments for ease of set-up and screen optimization.

ŲPower and OSD buttons lock.

ŲSecurity lock slot.

ŲOptimize eye comfort with a flicker-free screen. NOTE: The possible long-term effects of blue light emission from the monitor may cause damage to the eyes, including eye fatigue or digital eye strain. ComfortView feature is designed to reduce the amount of blue light emitted from the monitor to optimize eye comfort.

About Your Monitor | 7

Identifying Parts and Controls

Front view

12

LabelDescription

1Function buttons (For more information, see Operating the Monitor)

2Power on/off button (with LED indicator)

8 | About Your Monitor

Back View

6 1 2 3 4 5 DELL

U2421HE䃠޳桨ॐ֘

'OEŽ'OEŽ''OE

OE'¦OE...-OE''

ID XXXXXXXXXXID XXXXXXXXXX

XXXXXX-XXXXXXX

U2421HE

January 2020

LabelDescriptionUse

1VESA mounting holes (100 mm x 100

mm-behind attached VESA cover)Wall mount monitor using VESA-compatible wall mount kit (100 mm x 100 mm).

2Regulatory labelLists the regulatory approvals.

3Stand release buttonRelease stand from monitor.

4Security lock slotSecures monitor with security cable lock (sold separately).

5Mac address, Barcode, serial number, and Service Tag labelRefer to this label if you need to contact Dell for technical support.

6Cable management slotUse to organize cables by placing them through the slot.

Side View

USB downstream port

Port with battery icon supports BC 1.2.

About Your Monitor | 9

Bottom View

1 2 3456

10 789

LabelDescriptionUse

1AC power portTo connect the monitor power cable.

2HDMI portConnect your computer with HDMI cable (optional).

3DP port (in)Connect your computer with DP cable.

4USB Type-C/DisplayPortConnect to your computer using the USB Type-C

cable. The USB 3.1 Type-C port offer the fastest transfer rate and the alternate mode with DP 1.4 support the maximum resolution of 1920 x 1080 at 60

Hz(U2421HE) and 2560 x 1440 at 60 Hz(U2721DE),

PD 20 V/3.25 A, 15 V/3 A, 9 V/3 A, 5 V/3 A.

NOTE:

USB Type-C is not supported on Windows

versions that are prior to Windows 10.

5DP port (out)

DP output for MST (multi-stream transport)

capable monitor. To enable MST, refer to instruction on section "Connecting the Monitor for DP MST

Function".

NOTE:

Remove the rubber plug when using DP out

connector.

6&8USB downstream ports(2)Connect your USB device. You can use these ports only after you have connected the USB cable (Type-C to Type-C) from the computer to the monitor. Port

with battery icon supports Battery Charging

Rev. 1.2.

7Audio line-out portConnect speakers to playback audio coming through

USB Type-C or DP audio channels.

Only supports 2-channel audio.

NOTE:

The audio line-out port does not support

headphones.

9RJ-45 connectorConnect Internet. You can surf Internet via RJ45 only after you have connected the USB cable(Type-A to Type-C or Type-C to Type-C) from the computer to the monitor.

10Stand lockLock the stand to the monitor using a M3 x 6 mm

(U2721DE)/ M3 x 8 mm (U2421HE) screw (screw not included).

10 | About Your Monitor

Monitor Specifications

ModelU2421HEU2721DE

Screen typeActive matrix - TFT LCDActive matrix - TFT LCD Panel TypeIn-plane switching TechnologyIn-plane switching Technology

Aspect ratio16:916:9

Viewable image

dimensions

Diagonal60.47 cm (23.8 in.)68.47 cm (27 in.)

Active Area

Horizontal527.04 mm (20.75 in.)596.74 mm (23.49 in.) Vertical296.46 mm (11.67 in.)335.66 mm (13.21 in.)

Area156246.3 mm

2 (242.15 in. 2 )200301.7 mm 2 (310.30 in. 2 Pixel pitch0.2745 mm x 0.2745 mm0.233 mm x 0.233 mm

Pixel per inch (PPI)92.5109

Viewing angle

Horizontal178° (typical)178° (typical)

Vertical178° (typical)178° (typical)

Brightness250 cd/m² (typical)350 cd/m² (typical) Contrast ratio1000 to 1 (typical)1000 to 1 (typical) Display screen coatingAnti-glare treatment of the front polarizer (3H) hard coatingAnti-glare treatment of the front polarizer (3H) hard coating

BacklightLEDLED

Response Time (Gray

to Gray)5 ms (FAST mode) 8 ms (NORMAL mode)5 ms (FAST mode) 8 ms (NORMAL mode)

Color depth16.7 million colors16.7 million colors

Color gamut*99% sRGB

99% REC709

85
% DCI-P399% sRGB99% REC70985% DCI-P3 Calibration accuracyDelta E < 2 (average)Delta E < 2 (average)

About Your Monitor | 11

ConnectivityŲ1 x DP 1.4 (HDCP 1.4)

Ų1 x HDMI1.4 (HDCP 1.4)

Ų1 x USB Type-C (Alternate

mode with DisplayPort 1.4,

USB 3.1 upstream port, Power

Delivery PD up to 65 W)

Ų1 x DP (Out) with MST (HDCP 1.4)

Ų2 x USB 3.0 downstream port

Ų2 x USB 3.0 with BC1.2 charging capability at 2A (max)

Ų1 x Analog 2.0 audio line out (3.5

mm jack)

Ų1 x RJ45Ų1 x DP 1.4 (HDCP 1.4)

Ų1 x HDMI1.4 (HDCP 1.4)

Ų1 x USB Type-C (Alternate

mode with DisplayPort 1.4,

USB 3.1 upstream port, Power

Delivery PD up to 65 W)

Ų1 x DP (Out) with MST (HDCP 1.4)

Ų2 x USB 3.0 downstream port

Ų2 x USB 3.0 with BC1.2 charging capability at 2A (max)

Ų1 x Analog 2.0 audio line out (3.5 mm jack)

Ų1 x RJ45

Border width (edge

of monitor to active area)5.0 mm (Top)

5.1 mm (Left/Right)

8.0 mm (Bottom)6.90 mm (Top)6.90 mm (Left/Right)

8.1 mm (Bottom)

Adjustability

Height adjustable

stand130 mm130 mm

Tilt-5° to 21°-5° to 21°

Swivel-40° to 40°-40° to 40°

Cable managementYesYes

Dell Display Manager

(DDM)CompatibilityEasy Arrangeand other key featuresEasy Arrangeand other key features

Security Security lock slot (cable lock sold separately) Anti-theft stand lock slot (to panel)Security lock slot (cable lock sold separately) Anti-theft stand lock slot (to panel)

At panel native only, under Custom Mode preset.

Resolution Specifications

ModelU2421HEU2721DE

Horizontal scan range30 kHz to 83 kHz30 kHz to 90 kHz

Vertical scan range56 Hz to 76 Hz56 Hz to 76 Hz

Maximum preset resolution1920 x 1080 at 60 Hz2560 x 1440 at 60 Hz

Video display capabilities

(DP & USB Type-C playback)480i, 480p, 576i, 576p, 720p, 1080i, 1080p

480i, 480p, 576i, 576p, 720p,

1080i, 1080p

12 | About Your Monitor

Preset Display Modes

U2421HE

Display ModeHorizontal

Frequency

(kHz)Vertical Frequency (Hz)Pixel Clock (MHz)

Sync Polarity

(Horizontal/

Vertical)

720 x 400 31.5 70.0 28.3-/+

VESA, 640 x 480 31.5 60.025.2-/-

VESA, 640 x 480 37.5 75.0 31.5 -/-

VESA, 800 x 600 37.960.340.0+/+

VESA, 800 x 600 46.975.049.5+/+

VESA, 1024 x 768 48.460.065.0 -/-

VESA, 1024 x 768 60.075.0 78.8 +/+

VESA, 1152 x 864 67.575.0108.0+/+

VESA, 1280 x 1024 64.060.0108.0+/+

VESA, 1280 x 1024 80.075.0135.0+/+

VESA, 1600 x 900 60.060.0108.0 -/+

VESA, 1920 x 108067.560.0148.5+/+

U2721DE

Display ModeHorizontal Frequency (kHz)Vertical Frequency (Hz)Pixel Clock (MHz)

Sync Polarity

(Horizontal/

Vertical)

720 x 400 31.5 70.0 28.3-/+

VESA, 640 x 480 31.5 60.025.2-/-

VESA, 640 x 480 37.5 75.0 31.5 -/-

VESA, 800 x 600 37.960.340.0+/+

VESA, 800 x 600 46.975.049.5+/+

VESA, 1024 x 768 48.460.065.0 -/-

VESA, 1024 x 768 60.075.0 78.8 +/+

VESA, 1152 x 864 67.575.0108.0+/+

VESA, 1280 x 1024 64.060.0108.0+/+

VESA, 1280 x 1024 80.075.0135.0+/+

VESA, 1600 x 1200 75.060.0162.0 +/+

VESA, 1920 x 108067.560.0148.5+/+

VESA, 2048 x 108066.5860.0147.16+/-

CVR, 2560 x 144088.860.0241.5+/-

About Your Monitor | 13

DP MST Multi-Stream Transport (MST) Modes

U2421HE

MST Source MonitorMaximum number of external monitors that can be supported

1920 x 1080/60 Hz

1920 x 1080/60 Hz3

N OTE: Maximum external monitor resolution supported is 1920 x 1080 60 Hz only.

U2721DE

MST Source MonitorMaximum number of external monitors that can be supported

2560 x 1440/60 Hz

2560 x 1440/60 Hz1

N OTE: Maximum external monitor resolution supported is 2560 x 1440 60 Hz only.

USB-C MST Multi-Stream Transport (MST) Modes

U2421HE

OSD Dis

p lay Info: Link rate(current)Maximum number of external monitors that can be supported

1920 x 1080/60 Hz

HBR32 HBR21

U2721DE

OSD Dis

p lay Info: Link rate(current)Maximum number of external monitors that can be supported

2560 x 1440/60 Hz

HBR3 (High Resolution)1

HBR3 (High Data Speed)0

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